Energy, work, power

Question 1

what 2 things does kinetic energy depend on

Answer 1

mass and velocity

Question 2

is kinetic energy always positive

Answer 2

yes

Question 3

is stored energy always positive

Answer 3

yes

Question 4

2 types of mechanical potential energy

Answer 4

gravitational and elastic

Question 5

stiffness

Answer 5

how much a material deforms

Question 6

deformation

Answer 6

change in object length

Question 7

what is happening when work = change in energy

Answer 7

something is gaining or losing energy

Question 8

what is happening when work = final energy - initial energy

Answer 8

something is applying a force to something else

Question 9

what is happening when work = force x displacement

Answer 9

something is being displaced

Question 10

power

Answer 10

rate at which work is performed

Question 11

work

Answer 11

change in energy

Question 12

why might someone with less lower limb power be more prone to falls

Answer 12

diminished ability to produce force and change KE of body’s center of mass, less time to perform the same amount of work requires more power